Cap for valve-stems



H. BRENNER.

CAP FOR VALVE STEMS.

APPLICATION FILED NOV. 24,1919.

1,379,676. PatentedMa ygl, 1921.

UHTED STATS HENRY BRENNER, OF NEVI YORK, N. Y.

CAP FOR VALVE-STEMS.

Application filed November 24, 1919.

T 0 all w 710m it may concern:

Be it known that I, HENRY BRENNER, a citizen of Hungary, residing in theborough of Manhattan, city of New York, county of New York, and State ofNew York, have invented certain new and useful Improve ments in Caps forValve-Stems, of which the following is a specification.

My invention relates to caps for tirevalves, and more particularlyrelates to that type of dustproof and waterproof cap that is adapted tobe readily slipped on and oil the tirevalve, thus avoiding the wellknown annoyances and difliculties often encountered in the laboriousoperation of screwing and unscrewing the cap on the valve, particularlyafter the valve has been in use for some time.

An object of my invention is to produce a cap for the above describedpurpose that is simple in construction and inexpensive to manufacture.

Further objects are the production of a. cap that is highly eflicient inuse and easy to adjust.

Still further objects and advantages will hereinafter appear from thefollowing description.

I will now describe an embodiment of my invention illustrated in theaccompanying drawing and will thereafter point out my invention inclaims.

In the drawing, Figure 1 is a side elevation of a cap for tire-valvesembodying my invention.

Fig. 2 is a similar view partly in central vertical section as viewedfrom the right in Fig. 1.

Fig. 3 is a horizontal section taken on the line 3-3 of Fig. 2.

In the drawing, I have shown the embodiment of my invention as appliedto a stand ard type of valve-stem, although it will be seen that myinvention is adapted to various types of valve-stems.

The embodiment of my invention illustrated in the drawing consists of acap 1 fitting over the usual tire valve-stem 2. The stem 2 has the usualair-inlet 8, and is provided with the usual arcuate threaded portionsinterrupted by two flat portions on opposite sides of the stem, and isshown as fitting into the felly 5 of the wheel. The nut Specification ofLetters Patent. Pat gntqgfl Iflay 31, 152i Serial No. 340,345.

4 holds the stem 2 in fixed position on the felly 5. A rubber washer 13is fitted over the stem 2.

It has been customary heretofore to provide dust-caps for tire stems,and such caps are usually screwed on the mlve-stem. This has been alaborious operation with new stems and after the stems have been in usefor some time and the threads worn or corroded, great difficulty hasbeen encountered in getting the caps on and on the valve stems. Toovercome this difiiculty I provide a cap 1 that readily slips over thevalvestem and locks in place at any d sired position. This cap 1 has anannular flange 6 at its lower or open end, forming a chamber for thelocking means for holding the cap on the Valve-stem. The flange 6 hasfitted into it, anupper washer 11, a lower washer 12 substantially ofthe shape and size of the interior of the flange 6, and a sliding washer7 between them. The washer 7 is somewhat smaller than the washers 11 and12 and is adapted to slide in the chamber as hereinafter described. Thebottom of the flange 6 and the three washers contained therein havecentral openings having two opposite sides flat and the other oppositesides arouate, corresponding to the shape of the valvestem, and adaptedto fit substantially snugly around said valve-stem. The opposite flatsides of the washer openings corresponding to the flat sides of thevalve-stem prevent the turning of the cap on the valvestem. A stud 1 1having a button 15 at its end is formed on the side 8 of the washer 7and projects through an opening in the flange 6. A block of rubber orother suitable elastic material is inserted in the flange 6 between thewashers 11 and 12 and at the end of the washer 7, opposite the stud 14;and button 15. The side of the opening of the washer 7, opposite thestud 14, is wedge shaped forming a tooth 9 adapted to enter intoengagement with the threads on the valve-stem 2.

Normally, when the cap embodying my invention is offthe valve-stem, theblock of rubber 10 presses against the washer 7 and pushes its centralopening out of alinement with the openings in the washers 11 and 12 andthe opening in the bottom of the flange 6. To fit the cap 1 over thevalve-stem 2, the button 15 is pressed in, forcing the washer 7 againstthe rubber block 10 until the central Openings are all in alinement. Thecap is then slipped over the valve-stem 2 until it strikes the rubberwasher 13, and the button 15 is released. The rubber block 10immediately pushes the washer 7 over until the tooth 9 in its centralopening engages with one of the threads on the valvestem 2, whichengagement locks the cap in place on the valve-stem. The fiat walls onthe valve-stem and the corresponding fiat sides of the washer 7 preventthe cap from turning on the valve-stem. To remove the cap from thevalve-stem, the operation is reversed, that is, the button 15 is againpressed in, forcing the washer 7 against the resilient block 10, untilthe tooth 9 is out of engagement with the threads on the valvestem 2,and the cap is pulled off the valvestem.

It will be seen that the cap embodying my invention consists of but fewparts and presents a smooth exterior surface that can be easily cleaned,and provides no place for dirt, dust or moisture to collect;

It is obvious that various modifications may be made in the constructionabove particularly described within the principle and scope of myinvention.

I claim: 7 I

1. A cap for valve-stems, consisting of a casing closed at one end andopen at the other, a chamber at the open end, such casing and chamberadapted to slide on and off a valve-stem, a sliding washer contained inthe chamber having an opening adapted to fit over the valve-stem, a studon one side of said washer projecting through the chamber, and aresilient block in the chamber at the opposite side of the washeradapted to bring the washer into engagement with the valvestem, when thecap is on the stem.

2. A cap for valve-stems, consisting of a casing, a chamber at one endofthe casing, a sliding washer contained in said chamber having anopening adapted to fit over the valve-stem, and resilient meansconsisting of a block of rubber for bringing the sliding washer intoengagement with the valvestem. I

In testimony whereof I have aiiiXed my signature to this specification.

' HENRY BRENNER.

